<div id="show"></div>
<script>


    function run(){
        var time = new Date();//获取系统当前时间
        var year = time.getFullYear();
        var month = time.getMonth()+1;
        var date= time.getDate();//系统时间月份中的日
        var day = time.getDay();//系统时间中的星期值
        var weeks = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
        var week = weeks[day];//显示为星期几
        var hour = time.getHours();
        var minutes = time.getMinutes();
        var seconds = time.getSeconds();
        console.log(seconds);
        if(month<10){
            month = "0"+month;
        }
        if(date<10){
            date = "0"+date;
        }
        if(hour<10){
            hour = "0"+hour;
        }
        if(minutes<10){
            minutes = "0"+minutes;
        }
        if(seconds<10){
            seconds = "0"+seconds;
        }
        //var newDate = year+"年"+month+"月"+date+"日"+week+hour+":"+minutes+":"+seconds;
        document.getElementById("show").innerHTML = year+"年"+month+"月"+date+"日"+week+hour+":"+minutes+":"+seconds;
        setTimeout('run()',1000);
    }

    run();



</script>